diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/target/cortex_a8.c | 67 |
1 files changed, 39 insertions, 28 deletions
diff --git a/src/target/cortex_a8.c b/src/target/cortex_a8.c index 43674635..d9c8bfb8 100644 --- a/src/target/cortex_a8.c +++ b/src/target/cortex_a8.c @@ -120,34 +120,27 @@ target_type_t cortexa8_target = */ int cortex_a8_init_debug_access(target_t *target) { -#if 0 -# Unlocking the debug registers for modification -mww 0x54011FB0 0xC5ACCE55 4 - -# Clear Sticky Power Down status Bit to enable access to -# the registers in the Core Power Domain -mdw 0x54011314 -# Check that it is cleared -mdw 0x54011314 -# Now we can read Core Debug Registers at offset 0x080 -mdw 0x54011080 4 -# We can also read RAM. -mdw 0x80000000 32 - -mdw 0x5401d030 -mdw 0x54011FB8 - -# Set DBGEN line for hardware debug (OMAP35xx) -mww 0x5401d030 0x00002000 - -#Check AUTHSTATUS -mdw 0x54011FB8 - -# Instr enable -mww 0x54011088 0x2000 -mdw 0x54011080 4 -#endif - return ERROR_OK; + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + armv7a_common_t *armv7a = armv4_5->arch_info; + swjdp_common_t *swjdp = &armv7a->swjdp_info; + + int retval; + uint32_t dummy; + + LOG_DEBUG(" "); + + /* Unlocking the debug registers for modification */ + /* The debugport might be uninitialised so try twice */ + retval = mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_LOCKACCESS, 0xC5ACCE55); + if (retval != ERROR_OK) + mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_LOCKACCESS, 0xC5ACCE55); + /* Clear Sticky Power Down status Bit in PRSR to enable access to + the registers in the Core Power Domain */ + retval = mem_ap_read_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_PRSR, &dummy); + /* Enabling of instruction execution in debug mode is done in debug_entry code */ + + return retval; } int cortex_a8_exec_opcode(target_t *target, uint32_t opcode) @@ -1441,6 +1434,9 @@ int cortex_a8_examine(struct target_s *target) LOG_DEBUG("Configured %i hw breakpoint pairs and %i hw watchpoint pairs", cortex_a8->brp_num , cortex_a8->wrp_num); + /* Configure core debug access */ + cortex_a8_init_debug_access(target); + target->type->examined = 1; return retval; @@ -1559,6 +1555,17 @@ static int cortex_a8_handle_cache_info_command(struct command_context_s *cmd_ctx } +static int cortex_a8_handle_dbginit_command(struct command_context_s *cmd_ctx, + char *cmd, char **args, int argc) +{ + target_t *target = get_current_target(cmd_ctx); + + cortex_a8_init_debug_access(target); + + return ERROR_OK; +} + + int cortex_a8_register_commands(struct command_context_s *cmd_ctx) { command_t *cortex_a8_cmd; @@ -1575,5 +1582,9 @@ int cortex_a8_register_commands(struct command_context_s *cmd_ctx) cortex_a8_handle_cache_info_command, COMMAND_EXEC, "display information about target caches"); + register_command(cmd_ctx, cortex_a8_cmd, "dbginit", + cortex_a8_handle_dbginit_command, COMMAND_EXEC, + "Initialize core debug"); + return retval; } |